Possibly controversial, but our nct group (we're all post natal now, some ebf, 2 mixed) were discussing this. I know the medical stance seems to be to have a glass of wine 90minutes or more before a feed is fine, but our group leader suggested to have one DURING is fine too as it takes 30mins to hit your milk.
What if you think you've got a 90min window and don't - you can't not feed them? One of our group who is ebf and a doctor has a small glass most nights and says it's fine.
Sounds awful but I'd really like just a small glass once or twice a week.. (didn't at all.while pg)